Any api routes does not work in laravel project - laravel

Question

Any of my laravel project api routes does not work. It returns this
my test route:
Route::get('/test', function() {
return 'test';
});
When I open route in my browser directly (any routes even a test route):
Symfony\Component\ErrorHandler\Error\FatalError
with this error: laravel\framework\src\Illuminate\Auth\SessionGuard.php:29
my SessionGuard file:
<?php
namespace Illuminate\Auth;
use Illuminate\Auth\Events\Attempting;
use Illuminate\Auth\Events\Authenticated;
use Illuminate\Auth\Events\CurrentDeviceLogout;
use Illuminate\Auth\Events\Failed;
use Illuminate\Auth\Events\Login;
use Illuminate\Auth\Events\Logout;
use Illuminate\Auth\Events\OtherDeviceLogout;
use Illuminate\Auth\Events\Validated;
use Illuminate\Contracts\Auth\Authenticatable as AuthenticatableContract;
use Illuminate\Contracts\Auth\StatefulGuard;
use Illuminate\Contracts\Auth\SupportsBasicAuth;
use Illuminate\Contracts\Auth\UserProvider;
use Illuminate\Contracts\Cookie\QueueingFactory as CookieJar;
use Illuminate\Contracts\Events\Dispatcher;
use Illuminate\Contracts\Session\Session;
use Illuminate\Support\Arr;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Str;
use Illuminate\Support\Traits\Macroable;
use InvalidArgumentException;
use RuntimeException;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException;
class SessionGuard implements StatefulGuard, SupportsBasicAuth // line 29
{
In my artisan console:
PHP Warning: Unexpected character in input: '' (ASCII=1) state=0 in \vendor\laravel\framewor
k\src\Illuminate\Auth\GuardHelpers.php on line 36
My project was working without any problem, and I didnt change anything in my project, but today I have this problem.
Update:
When I create new route, it returns 404 error, cant define new routes, and my old routes still returns old error even when I delete them!